These files include data and estimation code for:

Boehmke, Frederick J. and Richard Witmer. 2004. �Disentangling Diffusion:
The Effects of Social Learning and Economic Competition on State Policy 
Innovation and Expansion.� Political Research Quarterly 57 (1): 39-51.

Compiled on March 12, 2004 by Frederick J. Boehmke (frederick-boehmke@uiowa.edu).

Included:

1 Stata data set before imputation (boehmke-witmer2004prq.dta).

5 ascii data sets after imputation (nbrs3*.asc).
5 Gauss data sets after imputation (nbrs3*.dat)
5 Gauss header files for Gauss data sets after imputation (nbrs3*.dht)
5 Stata data sets after imputation (nbrs3*.dta).

1 COUNT batch file (nbrs3.cnt) to run our analysis.

1 Stata batch file (nbrs-code.do) used to generate diffusion variables.

The nbrs-code.do file is not needed to replicate our results.
This file has already been run to generate our diffusion variables, 
which are included in the data sets.

These are the variables (in order) in the five ascii data sets and the five 
Gauss data sets for COUNT. These data sets are all identical. See 
boehmke-witmer2004prq.dta for data labels (also below). Imputation was
performed in AMELIA (see paper for details).

stateno year rpcpinc tot_pop ind_pop ind_pct black_m ideology religion 
fedtribe compacts init sigs casino deficit debt drpcpinc pl280 pl280opt south  
unified time timesq timecube initpass initfail nbrstot1 nbrstot2 nbrsany1 nbrsany2 
nbrsone1 nbrsone2 comptot lnftribe

init		"Has statutory or constitutional initiative"
sigs		"Initiative signature requirement"
casino		"Has casino gaming"
compacts	"Number of compacts negotiated in current year"
ideology	"State Ideology - EWM measure"
religion	"Log-odds fundamentalist Prot id - EWM measure"
fedtribe 	"# Federally recognized Indian tribes"
rpcpinc 	"Real per-capita income (1996 dollars)"
drpcpinc 	"Change in real per-capita income"
debt 		"Lagged - state debt as % of expenditures"
deficit  	"Lagged - deficit as % of expenditures"
unified		"Unified control of state government"
south		"Southern state" 
pl280 		"State with PL 280 (2) or rescinded 280(1)"
pl280opt	"State with PL 280 option"
tot_pop 	"Logged state population"
ind_pop 	"Logged state Indian population"
ind_pct		"State Indian population as log-odds"
initpass	"State passed indian gaming init or referendum"
nbrstot		"Total compacts in neighboring states (lagged)"
nbrsany		"Total number of neighbors with Indian gaming (lagged)"
black_m 	"State-level measure of support for aid to blacks (Norrander)"
stateno		"Numeric State Code"
statenam	"State Name"
state		"State Abbreviation"
year		"Year"
comptot 	"Compacts signed this year"
nbrstot1	"Lagged compacts in neighboring states (before innovation)"
nbrstot2 	"Lagged compacts in neighboring states (after innovation)"
nbrsany1 	"Lagged # neighboring states w/ compacts (before innovation)"
nbrsany2 	"Lagged # neighboring states w/ compacts (after innovation)"
nbrsone1 	"Lagged - one or more neighboring state has compacts (before innovation)"
nbrsone2 	"Lagged - one or more neighboring state has compacts (after innovation)"
time 		"Year-1989"
timesq 		"(Year-1989) squared"
timecube	"(Year-1989) cubed"

Note: The summary statistics in our paper for the initiative variable are incorrect.
They are based on the use of only state that allow direct initiatives. Our data here
and results in the paper use states with direct and/or indirect initiatives.

